To stabilize separation performance regardless of a winding diameter of a recording paper roll, and to prevent damaging of the recording paper or defective printing.

In a separation process, feeding amounts of the recording paper 23 are accumulated based on the number of printed papers, and a motor 19 is driven based on the accumulated feeding amount. When the motor 19 rotates the gear 31 by θ1 in counterclockwise direction, one end 33a of a coil spring 33 is displaced above in the figure, and a tip part 28a of a separation plate 28 is displaced to a contact position (in a state of (a)). At this time, an outer circumferential face of the recording roll 20 is pressed with a constant pressing force by the tip part 28a. After the separation process and when a gear 31 is rotated in the counterclockwise direction by θ2, one end 33a of the coil spring 33 is displaced below in the figure, and the separation plate 28 is displaced to a retraction position (in a state of (b)). In a printing process, the recording paper roll 20 is rotated and fed in a state where the separation plate 28 is separated from the outer circumferential face.